Carl Sagan, American astronomer and science communicator, manager of the famous message sent to the Voyager space probes, NASA proposed to take a picture of our planet when the Voyager spacecraft was at 6.000 million kilometers. NASA at first did not understand what sense would photograph our planet from a far away place. Thus, the Voyager turned to earth and took the picture far we've seen in our world. Carl Sagan called it "The little pale blue dot" and made the following comment ...